package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
	@Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
	public void autoFillPointCut() {}
	
	@Before("autoFillPointCut()")
	public void autoFill(JoinPoint joinPoint) {
		//1.获取到当前被拦截方法上的数据操作类型
		//1.1获取方法签名
		MethodSignature signature = (MethodSignature) joinPoint.getSignature();
		//1.2获取方法上的自定义注解对象
		AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
		//1.3 获取自定义注解中的操作类型，insert 还是update
		OperationType operationType = autoFill.value();
		//2.获取当前被拦截方法的参数---实体对象
		//2.1 获取参数
		Object[] args = joinPoint.getArgs();
		//2.2 获取第一个参数，可能是实体类对象也有可能是其他对象
		if (args == null || args.length == 0) {
			return;
		}
		Object entity = args[0];
		try {
			if (operationType == OperationType.INSERT) {
				Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
				Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
				setCreateTime.invoke(entity, LocalDateTime.now());
				setCreateUser.invoke(entity, BaseContext.getCurrentId());
			}
			Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
			Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
			setUpdateTime.invoke(entity, LocalDateTime.now());
			setUpdateUser.invoke(entity, BaseContext.getCurrentId());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
